(generally, ray flowers are lacking)

Snakeroot, Western Snakeroot, Western Boneset: Ageratina occidentalis (formerly Eupatorium occidentale) -

Trail Plant, Pathfinder: Adenocaulon bicolor -

Pearly Everlasting: Anaphalis margaritacea -

Pussytoes: The Genus Antennaria -

Common Burdock: Arctium minus -

Arnicas: The Genus Arnica -

Mugworts and Wormwoods: The Genus Artemisia -

Knapweeds: The Genus Centaurea -

Spotted Knapweed: Centaurea biebersteinii -

Diffuse Knapweed, Tumble Knapweed: Centaurea diffusa -

Black Knapweed: Centaurea nigra -

Rabbit-brush: Chrysothamnus nauseosus -

Thistles: The Genus Cirsium -

Horseweed Conyza canadensis var. glabrata - Rays are present but tiny.

Daisies and Fleabanes: The Genus Erigeron -

Purple Cudweed: Gamochaeta ustulata -

Slender Cudweed: Gnaphalium microcephalum -

Silverback Luina, Littleleaf Luina: Luina hypoleuca -

Pineapple-weed: Matricaria discoidea -

Sweet Coltsfoot: Petasites frigidus var. frigidus (Synonym: Petasites frigidus var. nivalis) -

Arctic Coltsfoot, Sweet Coltsfoot, Western Coltsfoot: Petasites frigidus var. palmatus (Synonyms: Petasites palmatus, Petasites speciosus) -

Silvery Raillardella: Raillardella argentea -

Rainiera, Tongue-leaved Luina, Tongue-leaf Luina: Rainiera stricta (formerly Luina stricta) -

Western Chocolate-cone: Rudbeckia occidentalis - ?

American Sawwort: Saussurea americana -

Butterweeds and Groundsels: The Genus Senecio -

Prickly Sow-thistle: Sonchus asper ssp. asper -

Common Sow-thistle: Sonchus oleraceus -

Common Tansy: Tanacetum vulgare -